Holography and Pseudo (Entanglement) Entropy (Vision Talk)

          @misc{ pirsa_PIRSA:25060017,
            doi = {10.48660/25060017},
            url = {https://pirsa.org/25060017},
            author = {Takayanagi, Tadashi},
            keywords = {Quantum Gravity, Quantum Information},
            language = {en},
            title = {Holography and Pseudo (Entanglement) Entropy (Vision Talk)},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {jun},
            note = {PIRSA:25060017 see, \url{https://pirsa.org}}
          }
          

Abstract

The holographic calculation of entanglement entropy implies that space coordinate in gravity may emerge from quantum entanglement. The next key question will be to understand how time coordinate may emerge from quantum information. After we review recent developments of pseudo entropy, which is a generalization of entanglement entropy, and its holographic calculation, we will point out that this quantity looks like a useful starting point to understand the emergence of time, by studying explicit examples of time-like entanglement entropy, traversable wormhole and dS/CFT. In the final short time, we would also like to briefly discuss how much the AdS/CFT is efficient as a quantum computer, where the notion of pseudo entanglement in the context of pseudo random states, plays an important role.